JP3013834B2 - Call processing method of VPN service - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a VPN (Virtual
The present invention relates to a call processing method in a Private Network (virtual private network), and more particularly to a call processing method in a VPN service when an actual dedicated line exists in the VPN group.

[0002]

2. Description of the Related Art Various documents have been published regarding a VPN service or another IN (Intelligent Network) service replacing the VPN service. For example, Japanese Unexamined Patent Publication No. Hei 4-291595, “Virtual Private Network Connection Method”,
JP-A-6-205137, "Virtual Private Line System", JP-A-7-183945, "Information Communication Network System", JP-A-7-221938, "Switching Network Having Detour Function", JP-A-8-195814 Publication "Method and Apparatus for Terminating Connection of Virtual Private Network".

[0003] However, none of these prior art documents discloses a method for effectively utilizing an actually existing dedicated line when an actual dedicated line and a VPN service are used together.

FIG. 7 is an explanatory diagram showing an example of a conventional call processing method when an actual dedicated line and a VPN are used together. In the figure, an X station 4 is a company Z located in a major city X.
PBX (Private Branch Exchange) installed at the head office of
The bureau is assumed to be a PBX located at the company's branch located in major city Y, which is remote from major city X.
This company Z has a branch service and a branch office in many local cities, so it receives the VPN service as a whole. However, since the communication volume between the X station 4 and the Y station 5 is large, it is connected by a dedicated line during this time. It is assumed that A station 1, B station 2, C station 3
Is an exchange in the general public network.

[0007] Considering FIG. 7 based on the above assumption, the subscribers 11 at the branch office in the local city of the company Z are referred to as the subscribers 5 accommodated in the Y station 5 which is the PBX of the branch office.
According to the conventional VPN service, when the subscriber 11 attempts to connect to the station 1, the A station 1 → the B station 2 → the C station 3 → the Y station 5
⇒ Become the route of the subscriber 51. A station 1 in FIG. 7 is an SSP
(Service switching point), and performs such routing according to the instruction of the SCP (service control point) 9.

[0006]

[Problems to be Solved by the Invention] However, from the viewpoint of the company Z, those who use the company's dedicated line from the subscriber 11 through the route of A station 1 ⇒ B station 2 ⇒ X station 4 ⇒ Y station 5 ⇒ subscriber 51 Is advantageous.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a call processing method for effectively using a dedicated line when an actual dedicated line and a VPN are used together. And

[0008]

According to the call processing method of the VPN service of the present invention, the call processing program executed by the SCP is revised in accordance with the present invention, and the program is made to use the dedicated line as effectively as possible. That is, in the first embodiment of the present invention, when the PBX network receiving the VPN (virtual private network) service has a dedicated line in the PBX network, the subscriber who is not connected to the dedicated line in the PBX network To call a subscriber connected to the leased line
In the service call processing method, the SCP for performing the VPN service specifies a calling area and a called area based on a calling number sent from the SSP and a dialed extension number, and the PBX network is determined by a combination thereof. By sending the number of the nearest entry point and the routing number in the PBX to the SSP, the connection using the dedicated line in the PBX is established.

In the second embodiment of the present invention, when a PBX network receiving a VPN (virtual private network) service has a dedicated line in the PBX network, a subscription not connected to the dedicated line in the PBX network is provided. In the call processing method of the VPN service when a subscriber outside the PBX network is called from the
Based on the calling number sent from the SP and the dialed outside number, the calling area and the called area are specified, and the number of the nearest entry point of the PBX network and the routing number in the PBX network are determined by a combination thereof. And the SS
By transmitting to the P, the connection is made using the dedicated line in the PBX network.

[0010] In a third embodiment of the present invention, when a PBX network receiving a VPN (virtual private network) service has a dedicated line in the PBX network, a subscriber outside the PBX network sends a private line in the PBX network. In the call processing method of the VPN service for calling a subscriber connected to the leased line, the SCP is an SSP.
A calling area and a called area are specified based on the calling number sent from the telephone number and the dialed extension number, and the nearest entry point of the PBX network and the routing number in the PBX network are determined by the combination using the combination. To the connection using the dedicated line in the PBX network.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. As a first embodiment of the present invention, a case of an extension call in the same group receiving the VPN service (referred to as the same VPN group) will be described with reference to FIG. 2, the same reference numerals and symbols as those in FIG. 7 indicate the same parts, respectively.
The area indicated by reference numeral 100 is in the same VPN group,
A case in which the subscriber 11 calls the subscriber 51 will be described. FIG. 1 shows a flow of processing of a call processing program in an SCP (service control point) 9 in this case and a call processing database used therefor.

In FIG. 1, the contents of processing 1 to processing 6 are ONA, PNP, subscription check, and MATRI, respectively.
X, COMBINE, and CONNECT are abbreviated, and DB11, DB21, and DB41 are databases, respectively. The abbreviation of the database is the same as the abbreviation of the process in which the database is used. The display in FIGS. 3 and 5 is the same.

The subscriber 11 is accommodated in the A station 1 as shown in FIG. When the subscriber 11 calls the subscriber 51,
The extension number (for example, YYY) of the subscriber 51 is dialed.
Since the A station 1 also serves as an SSP (service switching point), when receiving the dialing of the subscriber 11, it sends the calling number of the subscriber 11 and the extension number to the SCP 9. In the process 1, the SCP 9 checks the transmission number sent from the SSP 1 against the database DB11 and acquires the VPN group ID and the transmission area ID. The database DB11 used in the process 1 is composed of a table in which input information is a transmission number and output information is a VPN group ID and a transmission area ID. In the process 2, the SCP 9 transmits the extension number sent from the SSP 1 and the VPN group I acquired in the process 1.
D and the database DB 21 are collated to obtain the called number and the called area ID. In the database DB21 (PNP) used for the process 2, the input information is a VPN group ID.
And extension number, and the output information is called number and called area ID
.

In the process 3, it is checked whether or not the VPN group ID acquired in the process 1 is the ID of the VPN group that has joined the process of the present invention. If the user has not subscribed, a conventional VPN service is used, but the description is omitted.

According to the process 3, the subscriber 11 can use the VP of the present invention.
If you know that you belong to the group that subscribed to the N service,
Processing 4 is performed. In process 4, the VP obtained in process 1
The N group ID, the transmitting area ID, and the receiving area ID obtained in the process 2 are used as input information, and the number of the nearest entry point to the PBX network and the routing within the PBX network (ro
uting) to get the prefix to use as output information. In step 5, the prefix and extension number obtained in step 4 are edited to generate a routing number in the PBX network.

In process 6, the entry point number obtained in process 4 and the PBX routing number generated in process 5 are sent to SSP1. In this manner, the calling area and the called area are specified based on the calling number and the dialed extension number, and the number of the nearest entry point of the PBX network and the routing number in the PBX network are transmitted to the SSP by a combination thereof. , PBX network is used effectively.

Next, returning to FIG. 2, an embodiment of the processing shown in FIG. 1 will be described. It is assumed that the telephone number of the VPN subscriber 11 belonging to the group ggggg accommodated in the station A is aaaaaaaaa. When this subscriber 11 dials the extension number YYY,
The SCP 9 follows the call processing method shown in FIG. 1 and uses the entry point number xxxxxxxx and the routing number in the PBX network.
Send GGGGGYYY (prefix GGGGG + extension number YYY). The call goes to the nearest entry point via station B and X
Route to station 4. During this time, the intra-PBX routing number is retained.

From the X station 4 to the Y station 5 via a dedicated line according to the routing number in the PBX network, the Y station 5 uses the extension number YYY.
Is converted into a call to the Y-station subscriber 51 (telephone number yyyyyyyy).

The embodiment shown in FIGS. 1 and 2 uses the same VPN.
Although the case where a dedicated line is used for an extension call within a group, the present invention can be further applied to a call from inside a VPN group to outside the VPN group and a call from outside the VPN group to inside the group.

FIG. 4 shows V as a second embodiment of the present invention.
FIG. 9 is an explanatory diagram showing a case where a dedicated line is used for a call from inside the PN group to outside the VPN group. When the subscriber 11 talks with the subscriber 61, the subscriber 11 → A station 1 → B station 2
⇒ X station 4 ⇒ Y station 5 ⇒ C station 3 ⇒ D station 6 ⇒ A dedicated line is used according to the route of subscriber 61.

In the case of FIG. 4, the flow of the call processing program executed by the SCP 9 is as shown in FIG. Processing 1, processing 4, processing 5, and processing 6 in FIG. 3 correspond to processing 1, processing 4, processing 5, and processing 6 in FIG. 1, and processing 2 in FIG. 3 corresponds to processing 3 in FIG. Process 3 of 3 is a process abbreviated as OffNet Zone, and is a database D used in this process.
B31 is a database abbreviated as Off Net Zone.

In the process 1 of FIG. 3, the transmission number sent from the SSP 1 is compared with the database DB11 to obtain the group ID and the transmission area ID of the VPN service. The process 2 is a process for checking whether the VPN group ID has joined the process of the second embodiment of the present invention. If the VPN group ID has not joined the VPN group ID, the process goes from inside the VPN group to outside the VPN group. Conventional VPN services are applied. If the user has subscribed, the process proceeds to processing 3. In the second embodiment, since the called number is not registered in the database PNP, the database DB31-Off Net Zone is used. The DB 31 is a database that defines a telephone number area outside the VPN group and a district ID for each VPN group. In the process 3, the DB 31 is collated with the VPN group ID obtained in the process 1 and the dial number sent from the SSP1, that is, the outside line number, as input information, and the destination area ID is obtained.

In processing 4, the VPN group ID and the transmitting area ID obtained in processing 1 and the receiving area ID obtained in processing 3
, The number of the nearest entry point to the PBX network and a prefix used for routing in the PBX network are obtained as output information. In step 5, the prefix obtained in step 4 and the external line number sent from SSP1 are edited to generate a routing number in the PBX network. In process 6, the entry point number obtained in process 4 and the PBX network routing number generated in process 5 are sent to SSP1.

In this way, the calling area and the called area are specified on the basis of the calling number and the dialed outside line number, and the number of the nearest entry point of the PBX network and the routing number in the PBX network are sent to the SSP according to the combination. Sending and instructing a receiving method that makes effective use of the PBX network. FIG.
The main difference between FIG. 3 and FIG. 3 is that the Off Net Zone processing is performed in FIG. 3 instead of the PNP processing in FIG.
f In the Net Zone processing, the method of acquiring the destination area ID from the area of the outside line number is used, so that the PBX network can be effectively used as in the case of the extension call.

Returning to FIG. 4, the case where the subscriber 11 calls the subscriber 61 will be described. The telephone number of the VPN subscriber 11 belonging to the group ggggg accommodated in the A station 1 is aaaaaa
aa. When the subscriber 11 dials the external number dddddddd of the subscriber 61 in the process of making an external call, S
The CP 9 follows the call processing method of FIG. 3 and has the entry point number xxxxxxxx and the routing number HHHHHddd in the PBX network.
Send ddddd (prefix HHHHH + external line number dddddddd).

The call is routed to the nearest entry point via station B to station X which is a PBX. During this time, the intra-PBX network routing number is retained. X station 4
To the Y station 5 via a dedicated line using a routing number in the PBX network, and from the Y station 5 to the outside of the PBX again by the prefix HHHHH, and via the C station 3 to the D station 6
To the subscriber 61 whose telephone number is dddddddd.

FIG. 6 shows V as a third embodiment of the present invention.
VPN for calls from outside the PN group to inside the VPN group
FIG. 3 is an explanatory diagram showing a case where a dedicated line in a group is used, in which a subscriber 11 accommodated in a switching center E station 1 belonging to a general public network talks with a subscriber 51 in a VPN group. 11 ⇒ E station 1 ⇒ B station 2 ⇒ X station 4 ⇒ Y station 5
⇒ A dedicated line is used according to the route of the subscriber 51.

In the case of FIG. 6, it is assumed that the station E is the SSP1, and the flow of the call processing program executed by the SCP 9 is shown in FIG.
As shown in FIG. Processing 1 in FIG. 5 corresponds to processing 1 in FIG. 1, processing 2 and processing 3 in FIG. 5 correspond to processing 2 and processing 3 in FIG. 1, and processing 4, processing 5, processing 6, and processing 7 in FIG. Respectively correspond to processing 3, processing 4, processing 5, and processing 6 in FIG.

In the case of FIG. 6, since the transmission source is outside the VPN group, it is not registered in the ONA which is the DB 11 of FIG. The subscriber 11 sends a V to the E station 1 from outside the VPN group.
Since the access code for accessing the inside of the PN group is dialed, the access code is sent from the SSP1 to the SCP9. In the processing 1 in FIG.
Acquire the group ID of the PN service. The database DB11 used for this processing is abbreviated as OFA, and the input information is the dialed access code and the output information is the VPN group ID.

In processing 2, the VPN group ID and the dialed extension number obtained in processing 1 are obtained as input information, and the called number and called area ID are obtained as output information. Process 3 is a process of checking whether the VPN group ID has joined the process of the third embodiment of the present invention,
If the user has not subscribed, the conventional VPN service for calling from outside the VPN group to inside the VPN group is applied. If the user has joined, the process proceeds to processing 4. In process 4,
The VPN group ID obtained in the process 1 and the outgoing number outside line number sent from the SSP1 are used as input information in the DB4.
1 is checked, and the transmission area ID is obtained as output information.

In the processing 5, the VPN group ID obtained in the processing 1, the transmitting area ID obtained in the processing 4 and the receiving area ID obtained in the processing 2 are used as input information to determine the nearest entry point to the PBX network. A number and a prefix to be used for routing in the PBX network are obtained as output information. In process 6, the prefix obtained in process 5 and the extension number sent from SSP1 are edited and PBX
Generate a routing number in the network. In the process 7, the entry point number obtained in the process 5 and the PBX network routing number generated in the process 6 are sent to the SSP1.

In this way, the calling area and the called area are specified based on the calling number and the dialed extension number, and the number of the nearest entry point of the PBX network and the routing number in the PBX network are determined by the combination thereof in SSP1. And instructs an incoming call method that makes effective use of the PBX network. The main difference between FIG. 1 and FIG. 5 is that the Off Net Zone processing is performed in FIG. 5 instead of the ONA processing in FIG.
In the Off Net Zone process, the method of acquiring the calling party's district ID from the area of the calling number outside the VPN group is used, so that the PBX network can be effectively used as in the case of the extension call.

Returning to FIG. 6, the case where the subscriber 11 calls the subscriber 51 will be described. The telephone number of the subscriber 11 accommodated in the E station 1 is eeeeeeee. This subscriber 1
When the subscriber 1 dials the extension number YYY of the subscriber 51 in the process of making an extension call, the SCP 9 follows the call processing method of FIG.
) Is sent.

The call is routed to the nearest entry point via the B station 2 to the X station 4 which is a PBX. During this time, the intra-PBX network routing number is retained. X station 4
To the Y station 5 via a dedicated line using a routing number within the PBX network, the Y station 5 converts the extension number YYY and receives the call at the PBX subscriber 51 (telephone number yyyyyyyy).

[0035]

As is apparent from the above description, according to the present invention, when a dedicated line exists in one VPN group, a subscriber who is not connected to the dedicated line in the VPN group receives the exclusive line. Extension calls to subscribers connected to the line, external calls from subscribers not connected to the leased line within the VPN group to subscribers outside the VPN group, The dedicated line is also effectively used for a call from a subscriber to a subscriber connected to the dedicated line in the VPN group. In addition,
Entry point to PBX network by combination with called area
By placing the database that manages the
Subscriber information and routing information of VPN subscribers
Can be centrally managed and there is a change in the subscriber or VPN configuration
Responsiveness to the network
effective.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a flow of a program executed by an SCP in a call processing method according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining a first embodiment of the present invention.

FIG. 3 is a flowchart showing a flow of a program executed by an SCP in a call processing method according to a second embodiment of the present invention.

FIG. 4 is a diagram for explaining a second embodiment of the present invention.

FIG. 5 is a flowchart showing a flow of a program executed by an SCP in a call processing method according to a third embodiment of the present invention.

FIG. 6 is a diagram for explaining a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing an example of a conventional VPN service.

[Explanation of symbols]

 1 A station, E station (SSP) 2 B station 3 C station 4 X station 5 Y station 6 D station 9 SCP 11 Subscriber 41 Subscriber 51 Subscriber 61 Subscriber

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 3/42 H04M 3/00 H04Q 3/58

Claims (3)

(57) [Claims] 1. A virtual private network (VPN)
Private network) The PBX network that receives the service is located in the PBX network.
If it has a dedicated line, it is connected to the dedicated line in the PBX network.
Subscribers who are connected to the leased line
In the call processing method of the VPN service when calling, an SCP (service control point) for performing the VPN service is used.
)To VPN group ID and calling area I corresponding to the calling number
D and the VPN group ID
The called number and the called area ID correspond to the extension and the extension number.
The described table, the VPN group ID and the
PBX corresponding to the calling area ID and the called area ID
The number of the nearest entry point to the network and the PBX network
Prefix for use in routing within
Has a table on which  Outgoing call sent from SSP (Service Exchange Point)
Based on the number and the extension number dialed,
The PBX network is identified by specifying the receiving area and the combination thereof.
And the number of the nearest entry point in the PBX network
And sending the operating number to the SSPS to process
PCV using the dedicated line in the PBX network.
Call processing method of PN service. (2)The PBX network receiving the VPN service is
When a dedicated line is provided in the PBX network, the dedicated line is used in the PBX network.
A subscriber outside the PBX network from a subscriber who is not connected to the service line
In the call processing method of the VPN service when calling a caller, SCP for performing VPN service, VPN group ID and calling area I corresponding to the calling number
D and the VPN group ID
And the telephone number on which the called area ID is written
Table, the VPN group ID and the transmission area ID
The nearest to the PBX network in correspondence with the destination area ID
Entry point number and route in the PBX network
Table with prefixes used for
Have Calling number sent from SSP and dialed outside line
Outgoing calls based on numbers Identify the district and the called district
Nearest entry point of the PBX network by combination
And the routing number in the PBX network by the S
By using an SCP that performs processing for sending to the SP, V using the dedicated line in the PBX network.
Call processing method of PN service. (3)The PBX network receiving the VPN service is
If there is a dedicated line in the PBX network, join outside the PBX network
From a subscriber connected to the leased line in the PBX network.
In the call processing method of the VPN service when calling, SCP for performing VPN service, Access code from outside the VPN group to inside the group
A table in which the VPN group ID is described correspondingly
And the VPN group ID and extension number
A table with the called number and the called area ID
The destination is associated with the VPN group ID and the outside line number.
A table with the ward ID, the group ID and the previous
PB corresponding to the calling area ID and the called area ID
The number of the nearest entry point to the X network and the PBX
Prefix used for routing in the network
Has a table described, Calling number sent from SSP and dialed extension
Identify the calling area and called area based on the number, and
Nearest entry point of the PBX network by combination
And the routing number in the PBX network by the S
By using an SPC that performs processing for sending to the SP, V using the dedicated line in the PBX network.
Call processing method of PN service.